History of Diamond Grading in Australia

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Explore DCLA’s legacy as Australia’s leading diamond authority. Learn our history, meet the founders, and discover our unmatched grading expertise.

Cushion Cut

The cushion cut diamond is a popular diamond shape known for its rounded edges and square or[…]

Cubic Zirconia
Cubic Zirconia

Cubic Zirconia (CZ) is a synthetic gemstone that is often used as a diamond simulant.

Culet

The diamond culet is the flat surface at the very bottom of the diamond, specifically at the[…]

Crown Height Percentage

The diamond crown height percentage refers to the ratio of the height of the crown (the top[…]

Crystal

An internal crystal in a diamond refers to a type of inclusion (a naturally occurring characteristic inside[…]

Crown

A diamond crown refers to a piece of jewelry, often a tiara or headpiece, that is adorned[…]

Crown Angle

The term "diamond crown angle" typically refers to the angle at which the crown of a diamond[…]

For a round brilliant cut, an ideal crown height typically falls between 12% and 16% of the total diamond depth.
Crown Height

The crown height of a diamond refers to the vertical measurement of the crown portion of the[…]

zimbabwe-diamond-mine
Conflict Diamonds

Conflict diamonds, also known as blood diamonds, are diamonds that are mined in war zones or regions[…]

DCLA uses an official master set of diamonds to compare the diamond in question and determine its exact colour grade.
Colour

Diamond Colour is one of the most important factors in determining a diamond’s quality and value. DCLA[…]

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